Where to find cardboards for sports cards shipping ?

[jaydee12321]

Hi,

I would like to ship my sold sports cards with a very thick piece of paper like that one on the photo below.  Tried to find some on eBay with no success.

Does somebody know where I can find such shipping material ? Thanks

[mckicalgry]

See link below...not sure is this is what you are looking for...

https://www.thepackagingcompany.com/chipboard-pads-8-5-x-11.html